How to make sure randomly loaded externals swfs are fully loaded [F8]

[lsterling03]

I am randomly loading external swfs into my main movie. I've got the random part working. However, I don't know how to make sure the random swf is fully loaded before jumping to a specific frame in my main movie.

I have a preloader inside each external swf, but I don't know how to make my main movie understand that the random swf is completely loaded before the main timeline should gotoandPlay("start").

What I Have So Far:

I have a blank MC (named "location") on the main stage, which I am using to hold the random swfs. On the first frame inside this MC, I have the following code:

choice = Math.round(Math.random()*2);
switch (choice) {
case 0 :
location.loadMovie("image0.swf");
break;
case 1 :
location.loadMovie("image1.swf");
break;
case 2 :
location.loadMovie("image2.swf");
break;

}

Loading the random swfs is working perfectly. But after the external swf is fully loaded, I want to move onto a frame labeled "start" on the main stage. I just don't know how to make sure the random swfs are completely loaded before I say gotoandPlay("start").

I've tried piecing together bits from so many tutorials, and I just don't know what I need to do to make it work with my current code.

Thanks so much!